Witches Abroad: Discworld, Book 12

What could be easier than preventing a servant girl from marrying a prince, especially for three clever witches? But Granny Weatherwax, Nanny Ogg and Magrat Garlick face more than they bargained for....

Raising Steam

To the consternation of the patrician, Lord Vetinari, a new invention has arrived in Ankh-Morpork - a great clanging monster of a machine that harnesses the power of all of the elements: earth, air, fire and water....